"Odd" corn snake morph Addition


The “Odd” corn snake morph was randomly produced by BGSU in 2005, then proven to be recessive by BGSU in 2012.
It is mostly characterized by very thin saddles, but also sometimes displays a slightly higher color saturation - especially near the head (similar to Kastanie).
Detailed info from BGSU here: Odd Morph Information BGSU - Google Drive

Pantherophis guttatus

Name of Gene:

First produced by whom:
Eileen Underwood of BGSU

Year First Produced:

Genetics Type (Incdom/Codom/Recessive/Polygenic/etc):
Simple Recessive

In complex with other genes?:

Other names/aliases for it?:

Saddles mostly appear as thin stripes across the top of the body; they can also appear as spots along the edges of the top of the body - this is especially true toward the tail. Sometimes the saddle blotches disappear entirely near the tail. Saddle borders are nearly nonexistent. Slightly higher saturation near the head.

Appearance; What it does/looks like?

  • Head: No change
  • Body: Thin saddles blotches, saturation fade from head to tail.
  • Belly: No change
  • Tail: Saddle blotches either appear more spot-like, or sometimes disappear entirely by the tail.

Proven Lines: n/a
Related Genes: n/a

Proven: To what degree it is proven out to not just be polygenic?
Proven recessive through nearly 2 decades of breeding trials by BGSU with no doubts of its inheritance.

Unique: Why do you believe this is a new morph and not an existing one?
Aside from a single wild-caught corn snake originally called “Stillman” (which was proven to not be reproducible), no other single-gene mutation in corn snakes display this thinning & breaking apart of the saddle patterns to nearly the degree of the Odd mutation.

Problems: Any problems?
Fertility of visible-Odd corns is slightly lower on average than non-Odd corns.

History: The history behind its discovery?
Dr. Underwood of Bowling Green State University hatched the first Odd in their corn snake breeding program in 2005, then proved it recessive in 2012, and continue to do trials on the morph to the present day.

Disagreement or Controversy:
Presumably due to the difficulty of getting female Odds up to typical breeding size, Odd & het Odd females died more frequently of egg-binding in the BGSU study than non-Odds. Odd and het Odd corn snakes tend to grow much slower than average. While corn snakes typically grow an average of 1ft per year for 3-5 years, Odd and het Odd corns take 5-7+ years on average to hit the optimal target weight for breeding (females specifically).

References here on the community:


Agreed; please add!


Thanks for vastly expanding my knowledge regarding this mutation!


Happy to do so! Glad it helped :smiley:



Pretty cool to see a university involved with a breeding project and discovering a mutation, I bet that must have been really cool for any genetics/bio classes involved at that time!


I definitely see a consistent pattern change. Id agree with this gene added to the database!


I did not know these guys had fertility/egg-binding issues. I do love the look of them though.